Yes, a salt print with applied wax to surface. The wax is gently applied to the surface of the print with a cloth and rubbed in carefully.
I only have texts about waxing prints in books I have. Online, you can look at salt prints that are waxed at Mark Osterman's site, by his wife Frances, as I posted earlier. A typical wax is bees wax mixed with lavender oil. I don't believe that salt prints are inferior to albumen prints in image quality, others may disagree! A useful book is any good artists book on encaustics, there is also a 19th century book on silver printing I have which is also online